Self-filling fountain pen



Sept. 29, 1925.

H. P. FAIRCHILD SELF FILMNG FOUNTAIN PEN Filed May 14. 1924 a lever exposed on the Patented Sept. 29, 1925.

UNITED STATES HARRY P. FAIVRCHILD, or-

NEW YORK, N. Y., AYSSIGNOR TO FERMENE G. FAIRCHILD,

orNEw YORK, N. Y.

SELF-FILLING FUNTAIN PEN.

Application filed May 14,

To all wiz-m t may concern: y

Be it known that I, HARRY P. FAIRGHILD, a citizen of the United States of America, residing at New York, in the county and State of New York, have invented certain new and useful Improvements in Self-Filh ing Fountain Pens, of which the following is a full, clear, and exact description.

This invention relates to self-lling fountain pens of the type in which the ink is carried in a soft rubber container housed in the barrel of the pen, filling of the pen being accomplished by expansion of the container after it has been compressed by means of side of the barrel. The chief object of the invention is to improve such pens in several respects, especially in the direction of greater' convenience for carrying in the pocket, and complete protection from accidental displacement of the filling lever and consequent expulsion of ink. W ith this and other objects in view the invention comprises the novel features hereinafter described. l

One form of the invention is described in the accompanying drawing, in which Fig. 1 is a side view of the pen, with the cap in place, -ready for the pocket.

Fig. 2 is a side view with the fillerprotecting sleeve drawn backto expose the filling lever. y vf Fig. 3 is a longitudinal section.

Fig. 4 is a side view of the lining tube used inside of the filler sleeve.

Fig. 5 is a cross section on line 5 5 of Fig. 4, omitting the stub which limits the movement of the outer sliding sleeve.

The pen illustrated comprises a barrel 10, preferably a metal tube, having in its forward end a removable nozzle, which may consist of a metal sleeve 11 and a hard rubber bushing 12 inside of the same. The bushing, which fits snugly in the end of the barrel, carries on its inner reduced end the soft rubber ink sack or container 13, and also holds the rear end of the sleeve 11 against the forward end of the barrel, which terminates at the point 10a, immediately in front of the threaded portion 17, described hereinafter. The barrel is provided on one side with a longitudinal slot in which the filling lever 14 is pivoted, its inner end cooperating with a blade spring 15 so that when the lever is raised the sack will be flattened. Upon release of the lever the 1924. serial No. 713,158.

sack expands, sucking ink into it through the pen point, which is of course immersed in ink for the purpose. At the same time the spring 15 restores the lever to normal position in the slot. To give the lever adequate strength it is made slightly thicker than the thin wall of the barrel 10, thus causing it to project Vslightly above the'sur.- face of the barrel, as indicated in Fig. 3.

The cap 1G has aninner threaded portion @d 17 to cooperate with the threads on the end of the barrel, and is also provided with a flange 18 to seat on the end of the' nozzle sleeve 11, around the pen point 19,Y as in Fig. 3. The pen point and the inkfeed member 2O are fitted tightly in the nozzle bushing 12.

The ink sack 13 is made. considerably smaller than the inside of the barrel'which houses it, so thatthe unequal expansion4 and contraction of the sack and barrel, due to temperature changes, canA occur without forcing ink out of the pen point. This is an importantadvantage, as it eliminates what has been asource of frequent anno-yance in self-filling `pens of the sack type in the ast. At the same time the absence of theliard rubber barrel or lining commonly employed in silver or gold barrel pens reduces the total thickness of the barrel wall: sothat I am able to use an ink sack of large enough diameter to hold a considerable quantity of ink and still obtain the advantage mentioned above.

The filling lever is protected when the pen is not in use, by a metal sleeve 21, mounted to slide on the barrel 10. This sleeve has its forward end bent inwardly to form a flange 22 which rides smoothly on the barrel, and behind the flange is a lining tube 23, soldered or otherwise rigidly fixed to the sleeve to prevent relative rotation thereof. The lining tube is provided with rearwardly eX- tending longitudinal slots in its opposite sides, as shown at 24, 25, the former to re- 100 ceive the filling lever 14, and at the forward end of this slot the flange 22 is cut away to permit the sleeve to be pulled back entirely off the lever, as in Fig. 2. On the other side o-f the barrel is a lug or stop 26, 105 shown in section in Fig. 4, extending into slot 25. IVhen the sleeve is advanced, that is, pushed forward, its movement is limited by the rear end of the slot striking the lug. When the sleeve is retracted, to expose the no filling lever, its movement is limited by the flange 22 striking the lug. This prevents pulling the sleeve entirely off the barrel. rlhe stud also prevents rotation of the two sleeves' and thus protects the filling lever 14C from possible damage when the nib-pro'- tecting cap 16 is twisted to remove or rep-lace it. Otherwise a` firm twisting or turning of the cap while the pen is held by the outer sleeve 21 might bend or even break the fil-ling lever by the pressure exerted on it by the side-edge of the slot in the lining sleeve or the side-edge might ride up on the lever and become jammed. The stud, however, working in the other slot, takes the stress` when the cap is twisted and thus prevents any stress from being exertedl on the leven The rear end of the sleeve is closed by a l cupshaped plug 27, which serves to hold thecap: 16* when the pen is in use, as willx be readily understood.

From the foregoing it will be seen that whenthepen is carried in' the pocket the filling lever is entirely covered and protected by the sleeve, so` that by no possibility can iti be actuated accidentally. When the pen is to be filled, it is only necessary to pull the sleeve back onthe barrel'` which it should 't snugly but smoothly), thereby exposing the-lever. The sleeve also lengthens the pen for more convenient use in writing, thus permitting. the pen to be made short eno-ugh,

when collapsed,l for carrying in a. small' pocket, and yet be extended to 4normal-y length, forwriting, merely by pulling out-- the sleeve.v To prevent all possibility of acc'identa-ll actuation of the filling lever when thev pen is inl use the protecting sleeve need not be drawn allr the way back but can be l'eft withifts forward end overl the end of FigM 2.

It i-s to be understood that the invention isil not limited to the construction herein specifically illustrated and described but can be embodied in other forms without departure from its spirit as4 defined by the following claims.

I claim:

1. In a self-filling fountain pen, a barrel having a longitudinally extending filling lever in the side thereof, an outer sleeve slidable on the barrel to-vexpose or cover the filling lever at will, a. lining ysleeve secured toA the outer sleeve inside ofthe same and havi' having a longitudinally extending filling lever in the sid'e thereof, an` outer sleeve slidable on the barrel to expose or cover the fillinglever at will, a lining sleeve secured to the outer sleeve inside ofthe same and. havingl a pai-r of forwardly open rearwardly closed longitudinal slots one of which receives the filling lever to permit sliding movement of the sleeves, an inwardly extending flange on the forward endof the outer-sleeve fitting the barrel and` closing the forward end of the other slot in the lining sleeve, a stud fixed on the barrel and extending` into said other slot in the lining sleeve to prevent rotation of the outer and lining sleeves and limit the sliding motion thereof, and a plug closing the rear end of the outer sleeve. y

In testimony whereof I hereto affix myy signature. 4

HARRY P. FAIRGHILD. 

